diff --git a/gtk2_ardour/port_group.cc b/gtk2_ardour/port_group.cc
index 187cdef19a..94bb2c49e7 100644
--- a/gtk2_ardour/port_group.cc
+++ b/gtk2_ardour/port_group.cc
@@ -297,7 +297,7 @@ PortGroupList::gather (ARDOUR::Session& session, bool inputs)
 
 	/* Ardour stuff */
 
-	if (!inputs) {
+	if (!inputs && _type == DataType::AUDIO) {
 		ardour->add_bundle (session.the_auditioner()->output()->bundle());
 		ardour->add_bundle (session.click_io()->bundle());
 	}